OK,
saw a thread yesterday about the rear plate/frame rattling and a couple of products were recommended.

Someone please point me in the right direction!!

 

License Kit

Apply this on the backside of your plate and you should be good to go.
Only $15.

 

Or, if you already have a Pop-Rivet gun, just drill a hole in each lower corner of your plate frame, through the plate itself, the size of whatever rivets you happen to have on hand 1/8" or 3/16" work perfectly. The rivets will bind the plate to the frame and rattles are no longer possible. Use aluminum rivets to prevent rust.

I did this to my rear plate/frame simply because the rattle, whenever I closed the rear hatch, was annoying.

 

Good thinking manx!

Not sure why I didn't think of that. I fix the problem PLUS, I get to drill holes and rivet stuff!! SWEET!